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A doorbell video captured a violent explosion in Hayward, California, that injured at least six people and destroyed three properties Thursday morning.
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Various media outlets, citing the Pacific Gas and Electric Company, reported that the explosion was caused by a damaged underground gas line.
Aerial footage later showed smoke rising from the site.
Fire officials said two of the three properties were residential and one appeared to be used as a workshop. All six injured people were transported to nearby hospitals.
